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Pension Benefit Plans | 6 Months Ended
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Jun. 30, 2020
Retirement Benefits [Abstract] |
Pension Benefit Plans | The components of net periodic benefit cost for pensions benefits were as follows (in millions):
| For the Three Months Ended June 30, |  |  |  | For the Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
Service cost | $ | 1.4 |  |  | $ | 1.2 |  |  | $ | 2.8 |  |  | $ | 2.4 |
Interest cost | 1.6 |  |  | 1.9 |  |  | 3.3 |  |  | 5.4 |
Expected return on plan assets | (2.0) |  |  | (2.5) |  |  | (4.2) |  |  | (7.2) |
Amortization of prior service cost | — |  |  | 0.1 |  |  | 0.1 |  |  | 0.1 |
Recognized actuarial loss | 1.4 |  |  | 0.9 |  |  | 2.9 |  |  | 2.9 |
Settlements and curtailments | — |  |  | 60.6 |  |  | — |  |  | 60.6 |
Net periodic benefit cost | $ | 2.4 |  |  | $ | 62.2 |  |  | $ | 4.9 |  |  | $ | 64.2 |

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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